Head lamp for motor vehicles



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Patented Se t. 11, 1928.

UNITED STATES GEORGE E. JAGOIB,'0F nvANsroN, ILLINOIS.

HEAD LAMP FOR MOTOR VEHICLES.

Application filed July 22, 1927. I Serial No. 207,724.

This invention relates to automobile lamps. Particularly it relates to the ar rangement and construction of the light rcfleeting portions for the main head lamps for automobiles.

One of the objects of the invention is the provision of a lamp structure for carrying the light bulb, and one that can be bodily removed from the lampcasing at Wlll.

Another object is the provision of a light reflecting structure for condensing the 11ght rays and projecting the same in a flat beam upon the road ahead and Without being thrown into the eyes of the driver of an approaching car.

Still another object is to furnish a lamp structure in which a reflector'portion may be readily removed on occasion.

Again, an object lies in a novel form of light-bulb holding means by which accu-.

racy of bulb adjustment is possible aswell' as forsecuring said bulb firmly in position.

In addition, an object is that of providing a reflector portion bent up from sheet metal into novel form.

In the appended drawings,

Figure l is a front elevation of a lamp bodyshowing my invention installed thema same in elevation.

Figure 3 shows a reflector portion structure in perspective, as seen from the rear, separated from the lamp casing.

Figure 4 is a transverse section of the structure shown in Figure 3 taken on llne 4- 4 of that figure, and

Figure 5 shows part of the structure of Figure 3, in perspective, as it. appears during forming operations.

Besides the novel construction believed to be present in my device as illustrated and to be described, the invention seeks to go somewhat farther than the device forming the subject of my pending patent application for automobile lamps filed March 17, 1927 under Serial Number 176,134.

In Figures 1 and 2 the character 1 desig-- nates a lamp casing or drum having any usual lens 2 held in place at its front side by the common retaining ring My invention is comprised 1n a structure adapted to slidably fit into the casing 1, such structure carrying the usual light bulb, .the whole being firmly anchored in the casing by the bulb holding socket as will ap- Fi ure 2 is a longitudinal section of the pear. In-Figure 4, for example, the mentioned structure includes a fiat bottom portion 4 of metal having side walls 5 bent up therefrom, portions of both the bottom and sides being lapped upon one another as at 5 asshown also in Figure 3, said sides lying closer to one another at their. rear ends than at their forward ends as may beseen by a study of Figure 1, the edges resulting from lapping the parts being parallel for a purj pose to appear. Part of the bottom 4 is up turned at the rear end as at 6 and its edge is recurved about as shown in Figure .5 to form a groove 6' facing forwardly.

As shown in both Figures 2 and 3 part of the top edges of the sides 5 slope downwardly toward the rear while their top edges -for- -ward thereof are substantially parallel with the bottom 4 and have overturned. edges 9 to engage a part 10 as a closure for the upper side of the structure. In one form of my invention the said part 10'may include an upwardly and forwardly extending arched portion 11, or as in Figures. 1 and 2 this portion 11 may be replaced by a glass 11. The said bottom 4 may include a downwardly and forwardly extended arched portion 12 best shown in Figure 2. The sides 5 at their rear edges are formed each with an car 13, Figure 5, and these are lapped upon the rear end 6 as shown in Figure 3 creating a very rigid arrangement. In the bottom 4 is a circular opening 4 into which a semi-spherical reflector 14 is adapted to be placed, the usual flange 15 thereof adapted to rest upon the upper surface of said bottom.

As thus constructed .the box-like device is intended for insertion into the casing 1. Since the edges of the described lapped portions .at--5 are parallel when placed in said casing the resultant flanges will lie squarely upon the cylindrical wall of the same as illustrated in Figure 1, the distance between said edges naturally governing the position and height at which the inserted structure will lie. In the present instance the width of the bottom measurement from edge to edge is such that said structure will lie where the portion 12 just reaches the casing behind the retaining ring 3 and the portion 11, or 11 as the case may be, fits against the top wall of the casing also just behind 'saidring 3.

The reflector 14 is designed to rest upon the lower wall of the casing 1 while its said flange 15 rests upon the bottom 4 as already described, and here again it is to be noted that the position of the-structure carrying the bottom must be so located that when the reflector is drawn downwardly upon the easing by means about to be described the said flange will bear strongly upon said bot tom. A tapered, threadedand split fitting 16 extends through the reflector and casing an has aflange 17 to rest upon the former, while a nut 19 screws upon such fitting against said casing creating a clamping structure. A tube 20 fits snugly within the fitting 16 and is clamped by the latter, split at 18, by a nut21 screwed thereon. The said tube 20 receives at one end the usual bulb 22 and at the other the attachment plug 23 carrying the conducting cord 24.

Itis quite well known that in devices of this nature the parts carrying the lamp or bulb are diflicult to adjust by reason of the location thereof as well as being diflicult to hold in proper position due to the means em ployed. However, as I construct the parts the adjustment can be made outside the casing 1 and the effect watched as to the image cast upon a wall while making such adjustm'ent. By loosening the nut 21 the tube 20 .may be raised or lowered to properly focus the light, and may also be rotated to obtain the exact effect desired and then may be firmly clamped by the means described with little likelihood of being disturbed.

The inturned edges 7 .of the sides 5 of the device are designed to receive a mirror or reflector 8, the latter resting as well in the recurved portion 6 of the end 6 and said mir- -ror or reflector lies at an angle'o'f about 45 to the bottom 4 and the light rays from the reflector 14 are therefore cast directly forward. By releasing the reflector 1 1 the whole structure may be drawn out of the casing 1 and the said reflector 8 may be withdrawn for cleaning or for substituting another.

The purpose in making the structure in substantially the form shown is that the light rays will all be confined in a relatively small space and thus condensed or intensified. Said structure is relatively low in height and the reflector 8 is well back so that the light rays will be confined and projected straight ahead rather than upward.

In the top of the casing 1 above the described structure is a lamp 25 supported in a tube 26 whose rear end extends through the back wall of said casing and receives a conducting cord 27 which, together with the cord 2% may be connected in the usual way with suitable switches, not shown, for operating the lights as required. The lamp 25 may be employed for parking purposes and to this end the glassll before referred to is used in lieu of the portion 11 of Figure 3. Said lamp may also be used as a direction light or for other purposes not necessary to enumerate herein. A glass 28 may be placed in the top of the casing 1 above the lamp 25 -by means of which the driver may easily determine whether or notsaid lamp is lighted.

While the removable structure carrying the rgflectors 8 and 14:. may be preferably :bent into form it may, of course, bewotherwise constructed, as to method of manufacture.

Due to the manner of securing the affair in position vibration noises cannot result. The reflector 14 and bottom 4. may be made integral, of course, but preferably these are e separate parts.

I claim:

1. The combination with a casing for the 3 head lamp of a motor car, and a flanged primary reflector and its lamp secured at the 8 bottom of said casing arranged to direct light rays upwardly toward the top of said.

casing, of a secondary reflector structure of box-like form insertable in the casing 1ncludnig a bottom POItlOIlhZLVlIlg an opening to receive the said primary reflector, the

flange of'the latter bearing upon said bottom at said opening securing said secondary reflector in place, parts of the bottom at dia- F metrically opposite sides of the opening adapted to rest upon the casing in lines parallelin'g the longitudinal line of said casing,

thence extending away from said bottom forming opposite side portionsfor said sec ondary reflector and terminating each in a.

flange disposed at an angle of substantially- 45 to said "bottom, and a reflector-plateslidable beneath the flanges and facing at anangle the open front of said casing.

2. In combination, a reflector fora head lamp casing comprising a body of sheet alillh metal including a bottom portion having an opening therein, the metal at diametrically opposite sides of the opening extending away from said bottom portion forming the sides of said body, said sides terminating each in under side, and a, part engaging the said fl'angesof said sides adjacent the reflector plate and including an extension lying at an angle thereto, the last n'amed extension and the said angling extension of said bottom conforming to and adapted to abut the inner walls of said casing.

In testimony whereof Iaffix my signa-.

ture.

GEORGE F. JACOB. 

